4-Bromo-5-(difluoromethyl)-3-nitropyridine-2-carbonyl chloride
4-Bromo-3-(difluoromethyl)-2-nitropyridine-6-carbonyl chloride
4-Bromo-6-(difluoromethyl)-2-nitropyridine-3-carbonyl chloride
4-Bromo-6-(difluoromethyl)-3-nitropyridine-2-carbonyl chloride